Polyol compositions

Patent metadata

Field	Value
Publication number	US-2020031981-A1
Application number	US-201716337549-A
Country	US
Kind code	A1
Filing date	Sep 28, 2017
Priority date	Sep 30, 2016
Publication date	Jan 30, 2020
Grant date	—

Abstract

Embodiments of the present disclosure are directed towards polyol compositions including a dispersion of polyisocyanate polyaddition particles in a carrier polyol, wherein the polyisocyanate polyaddition particles have an average particle diameter from 0.1 to 10.0 microns and the dispersion has a solids content from 5 wt % to 50 wt % based upon a total weight of the dispersion, and a polyester polyol that is from 1 wt % to 98 wt % of the polyol composition based upon a total weight of the polyol composition.

First claim

1 . A polyol composition comprising:
a dispersion of polyisocyanate polyaddition particles in a carrier polyol, wherein the polyisocyanate polyaddition particles have an average particle diameter from 0.1 to 10.0 microns, and the dispersion has a solids content from 5 wt % to 50 wt % based upon a total weight of the dispersion; and a polyester polyol that is from 1 wt % to 98 wt % of the polyol composition based upon a total weight of the polyol composition.

2 . The polyol composition of claim 1 , wherein the polyester polyol is selected from a first polyester polyol, a second polyester polyol, and a combination of the first polyester polyol and the second polyester polyol.

3 . The polyol composition of claim 2 , wherein the first polyester polyol has an average functionality from 2.0 to 2.8 and a hydroxyl number from 215 mg KOH/g to 255 mg KOH/g

4 . The polyol composition of claim 3 , wherein the second polyester polyol has an average functionality from 2.4 to 3.5 and a hydroxyl number from 295 mg KOH/g to 335 mg KOH/g.

5 . The polyol composition of claim 2 , wherein the carrier polyol has a nominal hydroxyl functionality from 2.0 to 6.0.

6 . The polyol composition of claim 2 , wherein the carrier polyol has a hydroxyl number from 25 mg KOH/g to 350 mg KOH/g.

7 . The polyol composition of claim 1 , wherein the carrier polyol is a glycerin initiated polyol formed with propylene oxide.

8 . The polyol composition of claim 1 , wherein the polyol composition further comprises a surfactant.

9 . The polyol composition of claim 1 , wherein the polyol composition further comprises a catalyst.

10 . The polyol composition of claim 1 , wherein the polyol composition further comprises a flame retardant.

11 . A rigid closed-cell foam formulation comprising:
the polyol composition of claim 1 ; a blowing agent; and a polyisocyanate.

12 . The rigid closed-cell foam formulation of claim 11 , wherein the rigid foam formulation has a polyisocyante index from 150 to 500.

13 . A rigid closed-cell foam formed from the rigid foam formulation of claim 11 , wherein the rigid closed-cell foam has an average cell diameter from 90 microns to 165 microns.

14 . The rigid closed-cell foam of claim 13 , wherein the rigid closed-cell foam has a free rise density from 21 kg/m 3 to 50 kg/m 3 .

15 . A method for forming a rigid closed-cell foam comprising:
curing any one of the rigid closed-cell foam formulation of claim 11 .

Assignees

• Dow Global Technologies Llc

Inventors

• Riccio Rossella
• Amici-Kroutilova Irena
• Vairo Giuseppe
• Cookson Paul
• Casati Francois M
• Ferrari Elena

Classifications

• C08K5/21

  Urea; Derivatives thereof, e.g. biuret · CPC title

• C08G18/4211

  derived from aromatic dicarboxylic acids and dialcohols · CPC title

• C08G18/7621

  being toluene diisocyanate including isomer mixtures · CPC title

• C08K7/02

  Fibres or whiskers · CPC title

• C08G18/409 Primary

  Dispersions of polymers of C08G in organic compounds having active hydrogen · CPC title